Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J22261454+3412591

PSN J22261454+3412591   2011 11 18.735 *  22 26 14.54 +34 12 59.1  15.7 U    8E   1N            9 0

2011 11 18.735

B. Dintinjana and H. Mikuz report discovery of a possible supernova (mag 15.7) by H. Mikuz on four unfiltered CCD images (bandpass roughly equivalent to the R band) taken on 2011 Nov. 18.720-18.751 UT with the 60-cm f/3.3 Cichocki reflector in the course of the Comet and Asteroid Search Program (PIKA) at Crni Vrh Observatory. The new object is located at R.A. = 22h26m14s.54, Decl. = +34o12'59".1 (equinox 2000.0; uncertainty about 0".2), which is approximately 8" east and 1" north of the center of nearby galaxy. Image http://www.observatorij.org/vstars/PSN20111118/PSN20111118.jpg Nothing is visible at this location on archival PIKA images, obtained on 11 nights between 2005 Jun. 14 and 2010 Dec. 12. Also, nothing is visible at this position on several Digitized Sky Survey red and blue images from the Palomar Sky Survey.

2011 11 19.848

Further follow-up photometry by B. Dintinjana and J. Skvarc, using the same telescope and comparison stars from the USNO-B1 catalogue: R=15.84 +/-0.03

2011 11 20.1533

Object detected at position end figures 14.57, 58.1 (UCAC3). Magnitude 16.8 U +/- 0.5. Limiting magnitude 19.3. Used average of 25 x 60-sec images. Nothing visible at this location on DSS. Observer: R. A. Koff, Bennett, Colorado USA (H09). Image posted at: http://antelopehillsobservatory.org/SNpictures/PSNJ22261454+3412591final.jpg

2011 11 19.86

Asiago-Padova Spectroscopic ID: Type II SN a few days past maximum

2011 11 19.76

Asiago-Padova Spectroscopic ID: Transitional type IIn/Ibn, most similar to SN 2005la (this replaces the previous one)